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1、 语法填空，阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式。
Easton LaChappelle (be) a young inventor. At 14, he (build) a robotic arm from plastic blocks. Later, he met Jenny, a girl an artificial arm. Her arm cost much money and wasn't useful. Easton decided (help) her. He (invent) a new arm with a 3-D printer. It could move brain signals. Now, his design is online for free, (help) many people. Easton shows that curiosity and hard work can (create) amazing things. "I just want to (lend) a hand to those in need," he says. His story teaches us that anyone can be an inventor if they (keep) trying.
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2、 The invention was (complete) by accident.
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3、 He is an (imagine) boy who loves creating new things.
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4、 Despite the (fail), they didn't give up.
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5、 The smart stick (weigh) only 0.5 kilograms.
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6、 The keyhole of nature (open) doors to new discoveries.
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7、 They did many (experiment) to test the new product.
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8、 The 3-D (print) can make physical objects from digital designs.
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9、 She is (passionate) about science and wants to be an inventor.
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10、 The (invent) of the telephone changed communication.
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11、 Easton's invention has (help) many children.
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12、 ____ is important to share invention ideas with others.A、This B、That C、It D、What
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13、 The exhibition hall ____ many great inventions yesterday.A、shows B、showed C、has shown D、will show
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14、 She wished ____ a scientist when she grew up.A、becoming B、to become C、become D、became
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15、 The boy invented a stick ____ frozen juice.A、to hold B、holding C、held D、hold
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16、 ____ curious he is about the new machine!A、What B、How C、What a D、How a
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17、 They spent years ____ the sky and the earth.A、study B、to study C、studying D、studied
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18、 ____ the failure, he kept working on his invention.A、Despite B、Although C、If D、Because
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19、 The invention ____ by a 17-year-old boy last year.A、is made B、was made C、made D、makes
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20、 Lily decided ____ a new cup for her grandfather.A、design B、to design C、designing D、designed